X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_content.cc;h=c78dd3e695bbed9d11a1031d93587289345ba5ac;hb=bb0a36c3a6bea9cd1ebdde7b8a3a04765e317569;hp=9968f472561121e833f09392302ede079981575f;hpb=47f25009bcbc765e397bcb471dd361a511c99daf;p=dcpomatic.git

diff --git a/src/lib/audio_content.cc b/src/lib/audio_content.cc
index 9968f4725..c78dd3e69 100644
--- a/src/lib/audio_content.cc
+++ b/src/lib/audio_content.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -18,28 +18,171 @@
 */
 
 #include <libcxml/cxml.h>
+#include <dcp/raw_convert.h>
 #include "audio_content.h"
+#include "analyse_audio_job.h"
+#include "job_manager.h"
+#include "film.h"
+#include "exceptions.h"
+#include "config.h"
 
+#include "i18n.h"
+
+using std::string;
+using std::vector;
 using boost::shared_ptr;
+using boost::dynamic_pointer_cast;
+using dcp::raw_convert;
 
 int const AudioContentProperty::AUDIO_CHANNELS = 200;
 int const AudioContentProperty::AUDIO_LENGTH = 201;
 int const AudioContentProperty::AUDIO_FRAME_RATE = 202;
+int const AudioContentProperty::AUDIO_GAIN = 203;
+int const AudioContentProperty::AUDIO_DELAY = 204;
+int const AudioContentProperty::AUDIO_MAPPING = 205;
+
+AudioContent::AudioContent (shared_ptr<const Film> f, DCPTime s)
+	: Content (f, s)
+	, _audio_gain (0)
+	, _audio_delay (Config::instance()->default_audio_delay ())
+{
+
+}
 
-AudioContent::AudioContent (boost::filesystem::path f)
-	: Content (f)
+AudioContent::AudioContent (shared_ptr<const Film> f, boost::filesystem::path p)
+	: Content (f, p)
+	, _audio_gain (0)
+	, _audio_delay (Config::instance()->default_audio_delay ())
 {
 
 }
 
-AudioContent::AudioContent (shared_ptr<const cxml::Node> node)
-	: Content (node)
+AudioContent::AudioContent (shared_ptr<const Film> f, cxml::ConstNodePtr node)
+	: Content (f, node)
 {
+	_audio_gain = node->number_child<float> ("AudioGain");
+	_audio_delay = node->number_child<int> ("AudioDelay");
+}
+
+AudioContent::AudioContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
+	: Content (f, c)
+{
+	shared_ptr<AudioContent> ref = dynamic_pointer_cast<AudioContent> (c[0]);
+	assert (ref);
+	
+	for (size_t i = 0; i < c.size(); ++i) {
+		shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (c[i]);
+
+		if (ac->audio_gain() != ref->audio_gain()) {
+			throw JoinError (_("Content to be joined must have the same audio gain."));
+		}
+
+		if (ac->audio_delay() != ref->audio_delay()) {
+			throw JoinError (_("Content to be joined must have the same audio delay."));
+		}
+	}
 
+	_audio_gain = ref->audio_gain ();
+	_audio_delay = ref->audio_delay ();
 }
 
-AudioContent::AudioContent (AudioContent const & o)
-	: Content (o)
+void
+AudioContent::as_xml (xmlpp::Node* node) const
 {
+	boost::mutex::scoped_lock lm (_mutex);
+	node->add_child("AudioGain")->add_child_text (raw_convert<string> (_audio_gain));
+	node->add_child("AudioDelay")->add_child_text (raw_convert<string> (_audio_delay));
+}
+
+
+void
+AudioContent::set_audio_gain (float g)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_audio_gain = g;
+	}
+	
+	signal_changed (AudioContentProperty::AUDIO_GAIN);
+}
+
+void
+AudioContent::set_audio_delay (int d)
+{
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		_audio_delay = d;
+	}
+	
+	signal_changed (AudioContentProperty::AUDIO_DELAY);
+}
+
+boost::signals2::connection
+AudioContent::analyse_audio (boost::function<void()> finished)
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+	
+	shared_ptr<AnalyseAudioJob> job (new AnalyseAudioJob (film, dynamic_pointer_cast<AudioContent> (shared_from_this())));
+	boost::signals2::connection c = job->Finished.connect (finished);
+	JobManager::instance()->add (job);
+
+	return c;
+}
+
+boost::filesystem::path
+AudioContent::audio_analysis_path () const
+{
+	shared_ptr<const Film> film = _film.lock ();
+	if (!film) {
+		return boost::filesystem::path ();
+	}
+
+	boost::filesystem::path p = film->audio_analysis_dir ();
+	p /= digest ();
+	return p;
+}
+
+string
+AudioContent::technical_summary () const
+{
+	return String::compose (
+		"audio: channels %1, length %2, content rate %3, resampled rate %4",
+		audio_channels(),
+		audio_length().seconds(),
+		audio_frame_rate(),
+		resampled_audio_frame_rate()
+		);
+}
+
+void
+AudioContent::set_audio_mapping (AudioMapping)
+{
+	signal_changed (AudioContentProperty::AUDIO_MAPPING);
+}
+
+/** @return the frame rate that this content should be resampled to in order
+ *  that it is in sync with the active video content at its start time.
+ */
+int
+AudioContent::resampled_audio_frame_rate () const
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+	
+	/* Resample to a DCI-approved sample rate */
+	double t = dcp_audio_frame_rate (audio_frame_rate ());
+
+	FrameRateChange frc = film->active_frame_rate_change (position ());
+
+	/* Compensate if the DCP is being run at a different frame rate
+	   to the source; that is, if the video is run such that it will
+	   look different in the DCP compared to the source (slower or faster).
+	*/
+
+	if (frc.change_speed) {
+		t /= frc.speed_up;
+	}
 
+	return rint (t);
 }